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#include <fs/types.h>
#include <fs/errno.h>
#include <fs/task.h>
#include <fs/util.h>
#include <fs/maccess.h>

#include "file.h"
#include "dentry.h"
#include "fs.h"

int k_chdir(char *newpath)
{
  declare_buffer(char,pathname,MAXPATHNAME);  
  int createflag=DENTRY_NOCREATE;
  struct dentry *d;
  __pid_t pid;
  int len;

  call_to_fs();
 
  len=__verify_read_nolen((char*)newpath);
  if ((!len)||(len>MAXPATHNAMELEN)) return_from_fs(-EVERIFY);
  __copy_from_user(pathname,newpath,len+1);

  pid=__get_pid();  
  lock_desctable(pid);

  d=find_dentry_from_ext(cwden_ptr(pid),(char *)pathname,&createflag);
  if (d==NULL) {
    unlock_desctable(pid);
    return_from_fs(-ENOENT);
  }

  unlock_dentry(cwden_ptr(pid));
  /* dovrebbe essere: cwden_ptr(pid)=d; */
  desctable[pid].fd_cwden=d;
  strcpy(cwd_ptr(pid),pathname);
 
  unlock_desctable(pid);
  return_from_fs(EOK);
}